Let's start out with the things you will need.
1. a clean catch container,unless your fluid needs replacing
2. An 1 1/4" wrench
3. A screwdriver or punch for driving cotter pins out
5. Pocket knife or pick of some sort to get the seals off
6. (2) 7/16 x 5/8 O-rings, China freight, or any hardware store
7. Some clean rags
8. Adequate lighting
9. Brake or carb cleaner (optional)
After getting everything you need, crawl under the tractor with some rags, maybe a screwdiver too and start cleaning everything off. Scrape off big chunks with the screwdriver, and use spray cleaner as needed. Don't forget to wipe off the top of the nut, and linkage too!!
Next, remove the cotter pins from both ends of position rod, and remove rod.
Carefully place catch container under rear axle.
Now use your 1 1/4" wrench to break nut loose. Unscrew nut slowly as fluid will start to ooze out. (Clocking nut, and pin is non essential as the other side of pin is universal in direction with bull gear). Now get ready to re-position catch container once nut is totally loose as the oil can come out quite rapidly.
Once nut, and pin are removed, gently separate pin from nut by gently pushing pin through nut from exterior side to interior side of nut. Take a small knife and gently pry up seal closest to interior side, and roll off. Take new seal, coat with oil, and gently roll on. Repeat same step with other seal. (in this order, new, and old seals will roll over other seal) Now coat inside of nut with light film of oil as well as the new seals on pin. Be sure to inspect for any dirt or debris, or damaged parts. Repair or replace as needed.
Finally we can re-assemble.
First, push pin into nut, then gently screw nut in hand tight only!!!!
Next attach short end of rod into its correct location first, then longer part of the rod into pawl pin. Then re-install any washers, and both cotter pins.
Next snug the 1 1/4" nut, and clean surrounding area.
Finally, refill fluid to full mark, replace fill cap, and run engine for 5-10 minutes while checking for leaks. Turn off engine, and re-check fluid level, and add as needed.
Edited by stiemmy, August 05, 2015 - 07:39 PM.